me_2

Hi all,

came through google on this subject. I play myself a little with chemical on a lab scale, recently a lot with bismuth.

I've tried regaining Bi from Bi2O3 by electrolysis which works fine in that way that I can extract the Bi. The result is a sludge of Bi and when dryed a Bi powder. The remelting give me problems. When I heat the Bi powder, a great part transforms back to Bi2O3. The only solution I can think of is melting it under a inert atmosphere so Bi can't react with O2. Any other solutions ?

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You also need to consider that the powdered Bi that you get will tend to oxidise rather rapidly when you melt it.

 

You could dissolve the Bi scrap in dilute acid then electrolyse it to reclaim the metal.

 

 

 

Suppose I melt the powdered bi under charcoal, lye or argon?

What do you mean with 'melting under charcoal' ?

Do you mean I should mix the Bi powder with charcoal and then melt it ? How do you clean up the Bi ?? I suppose there will always stay some C behind in the Bi ? Or will it float all on top ?

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